Really struggled to think of Gibraltar cause I didn't think of it as a city. Arguably could be listed as territory, although that might make it bit too easy.
I couldn't remember the rock formation because all the similar ones I know about in the US begin with devil - Devil's Honeycomb in Missouri, Devil's Tower in Wyoming, Devil's Postpile in California. I just couldn't get the devil out of my head. :)
It's not a big point, because the picture is abundantly clear, and most people got it right, but I have been wondering about the use of "landform"... Is that the best definition for picture #14? I would say it creates landforms, rather than being one. Then again, right now I couldn't come up with a better one-word definition for it...